Optical element, method for manufacturing the same, liquid crystal device, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorYoshitomo Kumai
Life of this patent
Estimating the term…
Abstract
An optical element includes: a substrate having a plurality of first regions and a plurality of second regions that are partitioned in plan view; a first grid one-dimensionally formed in the plurality of first regions on the substrate; a diffraction function portion including a plurality of grooves parallel to each other in the plurality of second regions on the substrate; and a second grid formed in a region excluding the plurality of grooves on the diffraction function portion. The optical element reflects a part of incident light and transmits a part of the incident light.
Claims16
An optical element, comprising:
- a substrate including a plurality of first regions and a plurality of second regions that are partitioned in plan view;
- a first grid one-dimensionally formed in the plurality of first regions on the substrate;
- a diffraction function portion disposed in one of the plurality of second regions, the diffraction function portion including a plurality of grooves parallel to each other;
- a plurality of protruded threads, the plurality of grooves being formed in the one of the plurality of second regions on the substrate and not being formed in the plurality of first regions on the substrate;
- and
- a second grid formed in a region on the plurality of protruded threads excluding the plurality of grooves,
- wherein the first and second grids each reflect a part of incident light and transmit a part of the incident light,
- the second grid and the plurality of protruded threads are formed of different materials;
- the first and second grids each have a polarization-separation function;
- and
- one first region of the plurality of first regions is provided between two second regions of the plurality of second regions when viewed in a cross-section of the substrate.
An optical element, comprising:
- a substrate including a plurality of first regions and a plurality of second regions that are partitioned in plan view;
- a first grid one-dimensionally formed in the plurality of first regions on the substrate;
- a diffraction function portion disposed in one of the plurality of second regions, the diffraction function portion including a plurality of grooves parallel to each other and a plurality of protruded threads, the plurality of grooves being formed in the one of the plurality of second regions on the substrate and not being formed in the plurality of first regions on the substrate;
- and
- a second grid formed in a region on the plurality of protruded threads excluding the plurality of grooves,
- wherein the first and second grids each reflect a part of incident light and transmit a part of the incident light,
- the second grid and the plurality of protruded threads are formed of different materials,
- the first and second grids each have a polarization-separation function, and
- a height of the diffraction function portion is set such that diffusion of the transmitted light is weaker than diffusion of the reflected light.
Dependencies are inferred from the claim text.